DE102008009584A1 - Sample i.e. plastic plate, pressure and tensile testing device, has guide mechanism with bars that are located on both sides of test sample, where centers of bars are connected in pairs by taps - Google Patents

Abstract

The device has upper and lower plates (9, 10) for mounting in a test machine with ferrules (4) of a test sample (M) and a guide mechanism for the ferrules, which are provided between pairs of bars (7, 8). The bars of the guide mechanism are located on both sides of the test sample and centers of the bars are connected in pairs by taps. The ferrules are connected with upper and lower plates by strips (1, 3) with slots (1a, 3a). The ferrules have a hinge connection with the plates by the strips and pins (35).

Description

The invention optimizes the test conditions of samples preferably in the manner of a plate made of a plastic material and also of other materials with the possibilities of stress on both pressure and tension. This ensures more precise coaxiality between the top and bottom clamps and regulation of the distance between the guides; Enclosed, the device provides the adaptation of all functional elements to the sample bar, taking into account absolute errors of the sample, for example, a roughness of its longitudinal axis. The ferrules ( 4 ) connect to the rods ( 7 ) 8th ) of the guide mechanism

State of the art

existing Devices for the investigation of the properties of Plastics do not provide the full range of testing options especially at the pressure.

The known devices for the tests accordingly the document of DPMA of 26 October 1984 - 31 10 935 has no means bowing longitudinal bend of the sample. In addition, missing in the device securing the coaxiality of Forcing and missing the opportunity to alternate the sample bar on the pressure and on train load.

The known device DE 198 40 442 C2 does not guarantee the coaxiality of the clamps, which is especially important in the pressure.

The device DE 10 2007 005 486 U1 is only intended for train testing.

The device according to the DE 37 35 484 A1 is predetermined only for pressure test.

It is also the device with the guide columns known, however, because of the friction in the possible Tilting of the inaccurate dimension of the forces arise can. In the known devices constructive elements are missing for Prevention of friction in the end surfaces of the sample rod with the ferrules, which affects the results of the dimensions.

task

The The aim of the invention is to provide a device for Pressure and tensile test, preferably of the type of plates made of plastic with the high coaxiality of the ferrules, with the automatic regulation of the game between the sample bar and guides and with the adaptation of the device for existing sample bar with the deviation from the mold, for example a curvature; the device must have the possibility the investigation of both free and one or two give pinching edges of the probab.

The The aim is achieved by the combination in this device forcing the sample rod with a guide mechanism, which consists of the moving and pairwise intersecting of both Pages composed of ferring rods is; the clamps have got through the girders make the joints with the top and bottom Plates; to the carrier are from the two sides of the test rod is the pole for adaptation and regulation the positions of the guides and for the division of the Test bar on the two zones; the stick connect with the second moving vertical with each ferrule has a diamond-shaped Groove for fixing the edges of the sample bar with help of special strips; the device contains the lock for the fixation of the vertical position of the clamps.

embodiment

The invention is explained in more detail below with reference to illustrated and described exemplary embodiments:
Show it:

1 : Overall view of the device with the sample bar in the clamps.

2 : View according to K, 1 : the connection of the rods of the guide mechanism with each other and with the ferrules.

3 : Cut LL according to 1 : the fastening of the hangers with the possibility of adaptation.

4 : Cut EE according to 1 : the distribution of the length of the sample to two parts.

5 : Cut GG according to 1 : fastening of strips to edges of a test rod for its mounting in ferries.

6 : Detail I according to 1 ,

7 : Cut NN according to 1 ,

The device contains upper horizontal bar ( 1 ) with the groove ( 1a ), two vertical bars ( 2 ), lower bar ( 3 ) with the groove ( 3a ). In the grooves ( 1a ) and ( 3a ) the ferrules ( 4 ) hinged. Each ferrule has the diamond-shaped groove ( 4a ). The device contains the wedges ( 5 ) with approaches ( 5a ) for the rounding of the edges of the sample rod (M) by means of the screws ( 6 ) for contact with the ferrules ( 4 ). Each ferrule is replaced by a bolt ( 35 ) with the bar ( 1 ) connected. The clamps have the cone-shaped Ausdrehengen ( 4c ) for the adaptation. The strips ( 1 ) and ( 3 ) are placed on the plates ( 9 ) and ( 10 ) attached. The plates ( 9 ) 10 ) are made using two paired rods ( 7 ) 8th ) connected. The paired rods arrange themselves from both sides of the ferrules. The rods connect on the left hinged with the plates ( 9 ) and ( 10 ) by two waves ( 11 ), on which the immovably mounted, and which between themselves with the help of the pins ( 31 ) in pairs. The cones ( 31 ) connect in pairs the centers of the rods ( 7 ) and ( 8th ) corresponding to the entire axis F. The right ends of the rods ( 7 ) and ( 8th ) have the roles ( 12 ) extending in the horizontal grooves ( 9a ) and ( 10a ) of the plates ( 9 ) and ( 10 ) are located. At the grooves ( 2a ) of the vertical bars ( 2 ) in pairs, the floor ( 16 ) with the groove ( 16a ), in a slider ( 22 ) and a wedge-shaped stop ( 21a ) with the spring ( 21 ) and the floor ( 17 ) with the guide stops ( 17a ) are located. In addition, for example, right bar ( 2 ) a stick ( 14 ) with moving strips ( 13 ) 15 ), Screws ( 33 ) and a Lammelenfeder ( 32 ). The floor ( 15 ) 16 ) 17 ) connect with the strips ( 2 ) using the jacks ( 18 ) 19 ) 20 ) with the possibility of regulation over height. The socket ( 18 ) has the screw ( 14a ), Rifle ( 14b ) and mother ( 14c ) for the fixation of the stick ( 14 ). Peripheral ends of all floor connect to the moving strips ( 42 ) in the carrier ( 41 ) with the help of the roles ( 44 ) and the axles 43 ).

For convenience of setting up the sample bar and for adaptation, the device has the floor ( 4d ) with a spring ( 4f ).

The device has the pins ( 34 ) for fixing the ferrules ( 4 ) if necessary.

• – den Probestab (M) mit den festigten an dem Drucksteinen (5) in den rautenförmigen Nuten (4a) der Zwingen (4) zu stellen;
• – die Leiste (13) zu dem Probestab (M) und mit Hilfe der Leiste (15) zusammen mit den Schrauben (15a) über dem Schnitt E-E den zusammenzupressen zu führen; fixieren die Achselage des Stocks (14) mit Hilfe der Schraube (14a), Buchse (14b) und Mutter (14c);
• – die Stock (16) bewegt sich zu dem Probestab (M) bis die Berührung. Dabei gescheht wegen das Verkeilen des Anschlags (21a) und Gleitstücks (22) in der Buchse (19) wegen Wirklich der Feder (21), was eine eigenmächtigen Bewegung des Stocks (16) von dem Probestab und entsprechende Bewegung der Leiste (42) vorbeugt zu führen;
• – Die Führungsanschläge (17a) zu dem Probestab (M) zu führen und zu fixieren.

For carrying out of researches by means of the device it is necessary:

• - the test bar (M) with the fastened to the pressure stones ( 5 ) in the diamond-shaped grooves ( 4a ) of the forcing ( 4 ) to deliver;
• - the bar ( 13 ) to the sample bar (M) and with the help of the bar ( 15 ) together with the screws ( 15a ) to pass over the section EE to compress; fix the armpit position of the stick ( 14 ) with the help of the screw ( 14a ), Rifle ( 14b ) and mother ( 14c );
• - the floor ( 16 ) moves to the sample bar (M) until the touch. It happens because of the wedging of the attack ( 21a ) and slider ( 22 ) in the socket ( 19 ) because of really the spring ( 21 ), which is an autonomous movement of the stick ( 16 ) of the sample bar and corresponding movement of the bar ( 42 ) prevents to lead;
• - The guide stops ( 17a ) to guide and fix the sample bar (M).

With effect of the pressure force the pairs of the rods ( 7 ) and ( 8th ) work between each other and with the plates ( 9 ) 10 ), which guarantees the vertical position of the vector of this force. The parts of the test bar (M) between the printing blocks ( 5 ) proportionally shorten their lengths A and B. Also done the same thickening of these two parts. The length A is slightly smaller than the critical length, which ensures the stability of the shape of the sample bar. In the thickening of the part A, the surfaces of the test bar act on the sliding blocks ( 22 ) the Storey ( 16 ) one. The sliding blocks apply the stops ( 21a ). Therefore, the sticks move ( 16 ) the strips ( 42 ) of the sample bar and by strips ( 42 ) determine a necessary position of the guide stops.

The Device can also realize the investigations in the train.

The Device expands technological possibilities of Investigations of different materials.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 19840442 C2 [0004]
• - DE 102007005486 U1 [0005]
• - DE 3735484 A1 [0006]

Claims (11)

Apparatus for compression and tension testing, comprising top and bottom plates for mounting in a testing machine with the clamps of the sample bar and a guide mechanism for the clamps, characterized in that the clamps ( 4 ) between the pairs of rods ( 7 ) 8th ) are located; while the pairs of rods of the guide mechanism are in pairs between each other from both sides of the sample rod (M) and the centers of the rods are using the pins ( 31 ) in pairs. Device according to claim 1, characterized in that the ferrules ( 4 ) through the strips ( 1 ) 3 ) with the grooves ( 1a ) 3a ) hinged with the top and bottom plates ( 9 ) 10 ) are connected Device according to claims 1, 2, characterized in that the clamps ( 4 ) by strips ( 1 ) 3 ) and the bolts ( 35 ) the joints with the plates ( 9 ) 10 ) to have; while the holes in the ferrules ( 4 ) for the arrangement of the bolts ( 35 ) from both sides of the conical turns ( 4c ) to have. Device according to one of claims 1 to 3, characterized in that the strip ( 1 ) vertical strips ( 2 ) with the sticks ( 14 ) 16 ) 17 ) from both sides of the sample bar (M); while the sticks ( 16 ) through the sliding blocks ( 22 ) and the floor ( 17 ) through the guide stops ( 17a ) through the strips ( 13 ) 15 ) can touch from the surfaces of the sample bar (M). Device according to one of claims 1 to 4, characterized in that the device the strips ( 42 ), which are arranged from both sides of the sample, enter the carrier ( 41 ) on the vertical bars ( 2 ) are mounted with the possibilities of horizontal movement; while connecting the strips ( 42 ) with the sticks ( 16 ) 17 ) contains Device according to one of claims 1 to 5, characterized in that the stick ( 16 ) the groove ( 16a ) with a sliding block ( 22 ), the wedge-shaped stop ( 21a ) and with the spring ( 21 ) Has. Device according to one of claims 1 to 6, characterized in that the sticks ( 16 ) 17 ) 14 ) on the strips ( 2 ) with the possibility of regulating its height by means of the bushings ( 18 ) 19 ) 20 ) to be assembled. Device according to one of claims 1 to 7, characterized in that the bushing ( 18 ) for the fixation of the stick the screw ( 14a ), the socket ( 14b ), the Muter ( 14c ) Has. Device according to one of claims 1 to 8, characterized in that the strip ( 5 ) for the recording of the sample, the approaches ( 5a ) to have. Device according to one of claims 1 to 9, characterized in that the stick ( 14 ) the lamellar spring ( 32 ) for the determination of the central position of the strips ( 13 ) 15 ) Has. Device according to one of claims 1 to 10, characterized in that for fixing the positions of the clamps ( 4 ) the sticks ( 34 ) Has.